/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2015 Microsoft Corporation
 * 
 * -=- Robust Distributed System Nucleus (rDSN) -=- 
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

/*
 * Description:
 *     base prototype for logging
 *
 * Revision history:
 *     Mar., 2015, @imzhenyu (Zhenyu Guo), first version
 *     xxxx-xx-xx, author, fix bug about xxx
 */

# pragma once

# include <dsn/service_api_c.h>
# include <stdarg.h>

namespace dsn {

/*!
@addtogroup tool-api-providers
@{
*/
class logging_provider
{
public:
    template <typename T> static logging_provider* create(const char* log_dir, logging_provider* inner)
    {
        return new T(log_dir, inner);
    }

    typedef logging_provider* (*factory)(const char*, logging_provider*);

public:
    logging_provider(const char*, logging_provider*) {}

    virtual ~logging_provider(void) { }
    
    virtual void dsn_logv(const char *file, const char *function, const int line, dsn_log_level_t log_level, const char* title, const char* fmt, va_list args) = 0;

    virtual void flush() = 0;
};

/*@}*/
// ----------------------- inline implementation ---------------------------------------
} // end namespace
